Originally Posted by
Freight Dawg
????? So what does the MP read when you are on the ground with the engine stopped? Have you ever started a chainsaw or lawnmower? Hint, it's easier to pull the motor through with the throttle open. With all due respect, it's time to stop arguing. You're not making any sense.
Atmosheric, The scenario of starting the engine is not a steady state. You are attempting to create vacuum on the intake stroke, but you do not have increased pressure in the other cylinders on a power stroke. (The 'spring effect' that flying chicken referred to)
But to be fair, I have not provided any data to support this, so perhaps lets put that aside...